The Mekong River, which________ several countries in Southeast Asia, ______to be playing a significant role in the region.
If we can’t put our hands ________ some food and water, we shall have nothing to eat.
—Let’s have lunch together. ________—Thanks, I’d like to. Where shall we meet?
Only in this way _______ our goals.
The computer center, ________ last year, is very popular among the students in this school.
As soon as she entered the room, the girl caught sight of the flowers ________ by her mother.